$ git clone -n https://src.fedoraproject.org/rpms/golang-github-niklasfasching-org.git /var/lib/mock/f45-build-12304-440/root/chroot_tmpdir/scmroot/golang-github-niklasfasching-org
Cloning into '/var/lib/mock/f45-build-12304-440/root/chroot_tmpdir/scmroot/golang-github-niklasfasching-org'...
$ git fetch origin ac5e6b2f345c112952aadd8fb5f6e2edbfb19219:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-niklasfasching-org
 * [new ref]         ac5e6b2f345c112952aadd8fb5f6e2edbfb19219 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac5e6b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild