$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f42-build-60932982-6585972/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f42-build-60932982-6585972/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin 3293ba616cd971b1f6d1e5c3fa0d4fe0af3f1021:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         3293ba616cd971b1f6d1e5c3fa0d4fe0af3f1021 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3293ba6 Version 4.5