GHA: Use source branch name in metarepo. #48

Job	Run time
Build RPM / Build	2m 39s
Build DEB (bookworm, amd64) / Build	2m 22s
Build DEB (bookworm, armhf) / Build	23m 46s
Build DEB (bullseye, amd64) / Build	1m 55s
Build DEB (bullseye, armhf) / Build	22m 12s
Build DEB (buster, amd64) / Build	1m 59s
Build DEB (buster, armhf) / Build	22m 32s
Build DEB (stretch, amd64) / Build	2m 4s
Build DEB (stretch, armhf) / Build	20m 46s
Meta RPM	0s
Copy to remote RPM	0s
Copy meta to remote RPM	0s
Copy hash to remote RPM	0s
Copy to remote DEB	0s
Meta DEB	0s
Copy meta to remote DEB	0s
Copy hash to remote DEB	0s
	1h 40m 15s

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