$ git clone -n https://src.fedoraproject.org/rpms/mk-files.git /var/lib/mock/f40-build-2011615-45725/root/chroot_tmpdir/scmroot/mk-files
Cloning into '/var/lib/mock/f40-build-2011615-45725/root/chroot_tmpdir/scmroot/mk-files'...
$ git fetch origin f693772004f5201097bc0d8093ac873937781a74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mk-files
 * [new ref]         f693772004f5201097bc0d8093ac873937781a74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f693772 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild