$ git clone -n https://src.fedoraproject.org/rpms/gramps.git /var/lib/mock/f45-build-12990-444/root/chroot_tmpdir/scmroot/gramps
Cloning into '/var/lib/mock/f45-build-12990-444/root/chroot_tmpdir/scmroot/gramps'...
$ git fetch origin 85e96555729b063c1b77c9c4d0238a43562d0ef0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gramps
 * [new ref]         85e96555729b063c1b77c9c4d0238a43562d0ef0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85e9655 Allow GExiv2 0.16