$ git clone -n https://src.fedoraproject.org/rpms/xautomation.git /var/lib/mock/f45-build-38601-725/root/chroot_tmpdir/scmroot/xautomation
Cloning into '/var/lib/mock/f45-build-38601-725/root/chroot_tmpdir/scmroot/xautomation'...
$ git fetch origin e887de7f989ab11b59298e7d16d5c7254d838e86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xautomation
 * [new ref]         e887de7f989ab11b59298e7d16d5c7254d838e86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e887de7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild