$ git clone -n https://src.fedoraproject.org/rpms/python-pyrpm.git /var/lib/mock/f45-build-32393-659/root/chroot_tmpdir/scmroot/python-pyrpm
Cloning into '/var/lib/mock/f45-build-32393-659/root/chroot_tmpdir/scmroot/python-pyrpm'...
$ git fetch origin bb9bfe2cc6fbb38a3fa2119bcd1c1ff5e88fe44b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyrpm
 * [new ref]         bb9bfe2cc6fbb38a3fa2119bcd1c1ff5e88fe44b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb9bfe2 Update to 0.18.0 (#2523282)