$ git clone -n https://src.fedoraproject.org/rpms/splix.git /var/lib/mock/f39-build-1492106-34526/root/chroot_tmpdir/scmroot/splix
Cloning into '/var/lib/mock/f39-build-1492106-34526/root/chroot_tmpdir/scmroot/splix'...
$ git fetch origin b5c014b84da3f9ab2b1961a58d0d7030f50bd066:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/splix
 * [new ref]         b5c014b84da3f9ab2b1961a58d0d7030f50bd066 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5c014b SPDX migration and fix prep warning for %patch