$ git clone -n https://src.fedoraproject.org/rpms/nik4.git /var/lib/mock/f40-build-2012931-45828/root/chroot_tmpdir/scmroot/nik4
Cloning into '/var/lib/mock/f40-build-2012931-45828/root/chroot_tmpdir/scmroot/nik4'...
$ git fetch origin af840cb91a3efae837f0188217e45c45905d1523:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nik4
 * [new ref]         af840cb91a3efae837f0188217e45c45905d1523 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af840cb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild