$ git clone -n https://src.fedoraproject.org/rpms/libomp.git /var/lib/mock/f41-build-1312356-23509/root/chroot_tmpdir/scmroot/libomp
Cloning into '/var/lib/mock/f41-build-1312356-23509/root/chroot_tmpdir/scmroot/libomp'...
$ git fetch origin 2be64e252a1e3813c1c75ca2ed4eb7eccbb294a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libomp
 * [new ref]         2be64e252a1e3813c1c75ca2ed4eb7eccbb294a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2be64e2 18.1.7 Release