$ git clone -n https://src.fedoraproject.org/rpms/mc.git /var/lib/mock/f41-build-side-1-3051164-38032/root/chroot_tmpdir/scmroot/mc
Cloning into '/var/lib/mock/f41-build-side-1-3051164-38032/root/chroot_tmpdir/scmroot/mc'...
$ git fetch origin a2bdd1ed7e1e27211a8229a8157939798286c13b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mc
 * [new ref]         a2bdd1ed7e1e27211a8229a8157939798286c13b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2bdd1e mc-4.8.32-1.fc41