$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f41-build-836999-158946/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f41-build-836999-158946/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin 877a6c6af23b799c684976bf268779ce4fc5b908:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         877a6c6af23b799c684976bf268779ce4fc5b908 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 877a6c6 Version 3.8.1