$ git clone -n https://src.fedoraproject.org/rpms/pew.git /var/lib/mock/f39-build-1559592-37326/root/chroot_tmpdir/scmroot/pew
Cloning into '/var/lib/mock/f39-build-1559592-37326/root/chroot_tmpdir/scmroot/pew'...
$ git fetch origin 13ef3d3d5fe13e3c9354ca78a16126679017d1d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pew
 * [new ref]         13ef3d3d5fe13e3c9354ca78a16126679017d1d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13ef3d3 Merge #1 `Enable shell completions, modernise spec`