$ git clone -n https://src.fedoraproject.org/rpms/g4music.git /var/lib/mock/f41-build-side-1-2955486-35548/root/chroot_tmpdir/scmroot/g4music
Cloning into '/var/lib/mock/f41-build-side-1-2955486-35548/root/chroot_tmpdir/scmroot/g4music'...
$ git fetch origin ee928e1204da6b1e92f1b47907d2ffa962f40bd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/g4music
 * [new ref]         ee928e1204da6b1e92f1b47907d2ffa962f40bd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee928e1 Version 4.0