$ git clone -n https://src.fedoraproject.org/rpms/golang.git /var/lib/mock/f45-build-364-209/root/chroot_tmpdir/scmroot/golang
Cloning into '/var/lib/mock/f45-build-364-209/root/chroot_tmpdir/scmroot/golang'...
$ git fetch origin 02bef7654e61311b76def25ee969ef060e4d535a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang
 * [new ref]         02bef7654e61311b76def25ee969ef060e4d535a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02bef76 Update bundled data