$ git clone -n https://src.fedoraproject.org/rpms/derrick.git /var/lib/mock/f41-build-853836-166734/root/chroot_tmpdir/scmroot/derrick
Cloning into '/var/lib/mock/f41-build-853836-166734/root/chroot_tmpdir/scmroot/derrick'...
$ git fetch origin 0b8679309e778fa3b63a1136bacaedb7a967be42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/derrick
 * [new ref]         0b8679309e778fa3b63a1136bacaedb7a967be42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b86793 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild