$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f40-build-1134420-20444/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f40-build-1134420-20444/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin 5852402df328e336748330919290c8b316f581a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         5852402df328e336748330919290c8b316f581a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5852402 Version 3.6.2