$ git clone -n https://src.fedoraproject.org/rpms/golang-github-blakesmith-ar.git /var/lib/mock/f45-build-11765-434/root/chroot_tmpdir/scmroot/golang-github-blakesmith-ar
Cloning into '/var/lib/mock/f45-build-11765-434/root/chroot_tmpdir/scmroot/golang-github-blakesmith-ar'...
$ git fetch origin 8f8fdd2122fecc01b371ad3d5757640719fec5e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-blakesmith-ar
 * [new ref]         8f8fdd2122fecc01b371ad3d5757640719fec5e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f8fdd2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild