$ git clone -n https://src.fedoraproject.org/rpms/golang-github-tklauser-numcpus.git /var/lib/mock/f45-build-12561-442/root/chroot_tmpdir/scmroot/golang-github-tklauser-numcpus
Cloning into '/var/lib/mock/f45-build-12561-442/root/chroot_tmpdir/scmroot/golang-github-tklauser-numcpus'...
$ git fetch origin e4224aa6362e4b5c1f7770f153f54e9c31c080be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-tklauser-numcpus
 * [new ref]         e4224aa6362e4b5c1f7770f153f54e9c31c080be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4224aa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild