$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f41-build-side-1-2656332-28443/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f41-build-side-1-2656332-28443/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin 122f33ae3500ccc931eac2c96f34879e365d4db3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         122f33ae3500ccc931eac2c96f34879e365d4db3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 122f33a Version 3.9.2