$ git clone -n https://src.fedoraproject.org/rpms/freeipa.git /var/lib/mock/f41-build-813527-148684/root/chroot_tmpdir/scmroot/freeipa
Cloning into '/var/lib/mock/f41-build-813527-148684/root/chroot_tmpdir/scmroot/freeipa'...
$ git fetch origin cff4e0f3521f2358c27b6b07efc7ed78f79ff235:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freeipa
 * [new ref]         cff4e0f3521f2358c27b6b07efc7ed78f79ff235 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cff4e0f 4.12.1-1: rebase to upstream 4.12.1