$ git clone -n https://src.fedoraproject.org/rpms/nyancat.git /var/lib/mock/f40-build-2013225-45860/root/chroot_tmpdir/scmroot/nyancat
Cloning into '/var/lib/mock/f40-build-2013225-45860/root/chroot_tmpdir/scmroot/nyancat'...
$ git fetch origin 4e70e33ddcec6ea5d4bccb28e1b3853b1ecc09e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nyancat
 * [new ref]         4e70e33ddcec6ea5d4bccb28e1b3853b1ecc09e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e70e33 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild