$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-sourcemap-1.git /var/lib/mock/f45-build-12727-443/root/chroot_tmpdir/scmroot/golang-gopkg-sourcemap-1
Cloning into '/var/lib/mock/f45-build-12727-443/root/chroot_tmpdir/scmroot/golang-gopkg-sourcemap-1'...
$ git fetch origin 2ae50e400992c392f860515d24b730fa661a0bab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-sourcemap-1
 * [new ref]         2ae50e400992c392f860515d24b730fa661a0bab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ae50e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild