$ git clone -n https://src.fedoraproject.org/rpms/imagefactory.git /var/lib/mock/f45-build-14056-456/root/chroot_tmpdir/scmroot/imagefactory
Cloning into '/var/lib/mock/f45-build-14056-456/root/chroot_tmpdir/scmroot/imagefactory'...
$ git fetch origin 66ed27abe1fb396563bd5c3dc06e8b2cad1940f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imagefactory
 * [new ref]         66ed27abe1fb396563bd5c3dc06e8b2cad1940f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66ed27a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild