$ git clone -n https://src.fedoraproject.org/rpms/d-spy.git /var/lib/mock/f39-build-1491251-34518/root/chroot_tmpdir/scmroot/d-spy
Cloning into '/var/lib/mock/f39-build-1491251-34518/root/chroot_tmpdir/scmroot/d-spy'...
$ git fetch origin 5229fd9dc71adf8be35411f72f9bf0b42277308c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/d-spy
 * [new ref]         5229fd9dc71adf8be35411f72f9bf0b42277308c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5229fd9 Update to 1.8.0