$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f42-build-side-1-3497735-45961/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f42-build-side-1-3497735-45961/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin 950f8de68b5f96e47cff62231ad7c509ff41d740:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         950f8de68b5f96e47cff62231ad7c509ff41d740 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 950f8de Version 4.4