$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mr-tron-base58.git /var/lib/mock/f45-build-12241-440/root/chroot_tmpdir/scmroot/golang-github-mr-tron-base58
Cloning into '/var/lib/mock/f45-build-12241-440/root/chroot_tmpdir/scmroot/golang-github-mr-tron-base58'...
$ git fetch origin 313c9f8434b55c79e0dd57497077b089b8c7a2fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mr-tron-base58
 * [new ref]         313c9f8434b55c79e0dd57497077b089b8c7a2fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 313c9f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild