$ git clone -n https://src.fedoraproject.org/rpms/debbuild.git /var/lib/mock/f42-build-3305018-41426/root/chroot_tmpdir/scmroot/debbuild
Cloning into '/var/lib/mock/f42-build-3305018-41426/root/chroot_tmpdir/scmroot/debbuild'...
$ git fetch origin 28e246f55284974b4d52b852b5d63bc45dda33b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/debbuild
 * [new ref]         28e246f55284974b4d52b852b5d63bc45dda33b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28e246f Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild