$ git clone -n https://src.fedoraproject.org/rpms/rubygem-temple.git /var/lib/mock/f39-build-1499424-34744/root/chroot_tmpdir/scmroot/rubygem-temple
Cloning into '/var/lib/mock/f39-build-1499424-34744/root/chroot_tmpdir/scmroot/rubygem-temple'...
$ git fetch origin 69e64d787f8f18fe4a4a533a1730e988db4a9146:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-temple
 * [new ref]         69e64d787f8f18fe4a4a533a1730e988db4a9146 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 69e64d7 Update to Temple 0.10.2.