$ git clone -n https://src.fedoraproject.org/rpms/genromfs.git /var/lib/mock/f40-build-2279237-55324/root/chroot_tmpdir/scmroot/genromfs
Cloning into '/var/lib/mock/f40-build-2279237-55324/root/chroot_tmpdir/scmroot/genromfs'...
$ git fetch origin 148b6143c47fdc32428078211182de79a0e66ae1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/genromfs
 * [new ref]         148b6143c47fdc32428078211182de79a0e66ae1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 148b614 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild