$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-trillian.git /var/lib/mock/f39-build-1825518-41863/root/chroot_tmpdir/scmroot/golang-github-google-trillian
Cloning into '/var/lib/mock/f39-build-1825518-41863/root/chroot_tmpdir/scmroot/golang-github-google-trillian'...
$ git fetch origin d61d05bb756bb60c5126933163dd15dc8c8a267e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-trillian
 * [new ref]         d61d05bb756bb60c5126933163dd15dc8c8a267e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d61d05b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild