$ git clone -n https://src.fedoraproject.org/rpms/python-pycatch22.git /var/lib/mock/f40-build-2223043-52724/root/chroot_tmpdir/scmroot/python-pycatch22
Cloning into '/var/lib/mock/f40-build-2223043-52724/root/chroot_tmpdir/scmroot/python-pycatch22'...
$ git fetch origin 614cb900741ef4c264b12cdf2ac6f1d8f9039403:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pycatch22
 * [new ref]         614cb900741ef4c264b12cdf2ac6f1d8f9039403 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 614cb90 Remove an obsolete spec-file comment