$ git clone -n https://src.fedoraproject.org/rpms/authselect.git /var/lib/mock/f42-build-side-1-3540419-46574/root/chroot_tmpdir/scmroot/authselect
Cloning into '/var/lib/mock/f42-build-side-1-3540419-46574/root/chroot_tmpdir/scmroot/authselect'...
$ git fetch origin 57e1970d0dfa619dea1abb0f2889071a992e8a27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/authselect
 * [new ref]         57e1970d0dfa619dea1abb0f2889071a992e8a27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57e1970 Update to 1.5.1 upstream release