$ git clone -n https://src.fedoraproject.org/rpms/godoctor.git /var/lib/mock/f38-build-side-42-init-devel-838025-28399/root/chroot_tmpdir/scmroot/godoctor
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-838025-28399/root/chroot_tmpdir/scmroot/godoctor'...
$ git fetch origin b6ff0d80c5727318c64299fa53f36794ace192cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/godoctor
 * [new ref]         b6ff0d80c5727318c64299fa53f36794ace192cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6ff0d8 Update to latest version (#2088659)