$ git clone -n https://src.fedoraproject.org/rpms/dejagnu.git /var/lib/mock/f41-build-side-1-2817249-32985/root/chroot_tmpdir/scmroot/dejagnu
Cloning into '/var/lib/mock/f41-build-side-1-2817249-32985/root/chroot_tmpdir/scmroot/dejagnu'...
$ git fetch origin 765f2570f17df6877a134aaa828a9ad38f04bbbb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dejagnu
 * [new ref]         765f2570f17df6877a134aaa828a9ad38f04bbbb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 765f257 Use external repository for downstream tests