$ git clone -n https://src.fedoraproject.org/rpms/R-argon2 /var/lib/mock/f39-build-1586770-38209/root/chroot_tmpdir/scmroot/R-argon2
Cloning into '/var/lib/mock/f39-build-1586770-38209/root/chroot_tmpdir/scmroot/R-argon2'...
$ git fetch origin 6e5dd5f910e95559d5d87ce87eb5abe697e0ac16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-argon2
 * [new ref]         6e5dd5f910e95559d5d87ce87eb5abe697e0ac16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e5dd5f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild