$ git clone -n https://src.fedoraproject.org/rpms/golang-github-karrick-golf.git /var/lib/mock/f45-build-12145-439/root/chroot_tmpdir/scmroot/golang-github-karrick-golf
Cloning into '/var/lib/mock/f45-build-12145-439/root/chroot_tmpdir/scmroot/golang-github-karrick-golf'...
$ git fetch origin 6f9ef5c28097b6ae8876d9cb91f38c820923cfcb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-karrick-golf
 * [new ref]         6f9ef5c28097b6ae8876d9cb91f38c820923cfcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f9ef5c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild