$ git clone -n https://src.fedoraproject.org/rpms/python-pycatch22.git /var/lib/mock/f40-build-730690-103596/root/chroot_tmpdir/scmroot/python-pycatch22
Cloning into '/var/lib/mock/f40-build-730690-103596/root/chroot_tmpdir/scmroot/python-pycatch22'...
$ git fetch origin eb0bd3a179d226c45fac88ef8db24b31b0acba2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pycatch22
 * [new ref]         eb0bd3a179d226c45fac88ef8db24b31b0acba2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb0bd3a Update to 0.4.4 (close RHBZ#2244336)