$ git clone -n https://src.fedoraproject.org/rpms/python-kajiki.git /var/lib/mock/f45-build-31219-651/root/chroot_tmpdir/scmroot/python-kajiki
Cloning into '/var/lib/mock/f45-build-31219-651/root/chroot_tmpdir/scmroot/python-kajiki'...
$ git fetch origin 354ade316ca5cc5576ee76232134df2f1b3bc2e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-kajiki
 * [new ref]         354ade316ca5cc5576ee76232134df2f1b3bc2e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 354ade3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild