$ git clone -n https://src.fedoraproject.org/rpms/muse.git /var/lib/mock/f40-build-1179311-21865/root/chroot_tmpdir/scmroot/muse
Cloning into '/var/lib/mock/f40-build-1179311-21865/root/chroot_tmpdir/scmroot/muse'...
$ git fetch origin 6fc2730326479ea525638368c203b2006ce4b1b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/muse
 * [new ref]         6fc2730326479ea525638368c203b2006ce4b1b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fc2730 updated to 4.2.1