$ git clone -n https://src.fedoraproject.org/rpms/realmd.git /var/lib/mock/f42-build-side-1-3587541-46932/root/chroot_tmpdir/scmroot/realmd
Cloning into '/var/lib/mock/f42-build-side-1-3587541-46932/root/chroot_tmpdir/scmroot/realmd'...
$ git fetch origin f83bfbd161052f34a5a5a991550fbdb29badc766:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/realmd
 * [new ref]         f83bfbd161052f34a5a5a991550fbdb29badc766 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f83bfbd Fix issues found by Coverity in renew code