$ git clone -n https://src.fedoraproject.org/rpms/simple-ccsm.git /var/lib/mock/f45-build-36063-701/root/chroot_tmpdir/scmroot/simple-ccsm
Cloning into '/var/lib/mock/f45-build-36063-701/root/chroot_tmpdir/scmroot/simple-ccsm'...
$ git fetch origin 1240d01eb4e864e5b184fef4060a6e9302c91116:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/simple-ccsm
 * [new ref]         1240d01eb4e864e5b184fef4060a6e9302c91116 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1240d01 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild