$ git clone -n https://src.fedoraproject.org/rpms/nitrogen.git /var/lib/mock/f40-build-797239-141191/root/chroot_tmpdir/scmroot/nitrogen
Cloning into '/var/lib/mock/f40-build-797239-141191/root/chroot_tmpdir/scmroot/nitrogen'...
$ git fetch origin 064bf6b7df940ada57c52e090c9c6afb5d01c263:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nitrogen
 * [new ref]         064bf6b7df940ada57c52e090c9c6afb5d01c263 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 064bf6b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild