$ git clone -n https://src.fedoraproject.org/rpms/golang-github-leodido-urn.git /var/lib/mock/f45-build-12136-439/root/chroot_tmpdir/scmroot/golang-github-leodido-urn
Cloning into '/var/lib/mock/f45-build-12136-439/root/chroot_tmpdir/scmroot/golang-github-leodido-urn'...
$ git fetch origin 049653ef3a2e839ae13180bf612c36a1d8bdc723:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-leodido-urn
 * [new ref]         049653ef3a2e839ae13180bf612c36a1d8bdc723 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 049653e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild