$ git clone -n https://src.fedoraproject.org/rpms/skopeo.git /var/lib/mock/f42-build-866818-174160/root/chroot_tmpdir/scmroot/skopeo
Cloning into '/var/lib/mock/f42-build-866818-174160/root/chroot_tmpdir/scmroot/skopeo'...
$ git fetch origin 51d5dfbd9fd0bc252e0fd6070cf538865402a542:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/skopeo
 * [new ref]         51d5dfbd9fd0bc252e0fd6070cf538865402a542 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51d5dfb Update to 1.17.0 upstream release