$ git clone -n https://src.fedoraproject.org/rpms/R-keyring.git /var/lib/mock/f40-build-2091063-50227/root/chroot_tmpdir/scmroot/R-keyring
Cloning into '/var/lib/mock/f40-build-2091063-50227/root/chroot_tmpdir/scmroot/R-keyring'...
$ git fetch origin d958df7cce166c63ae65b1f7ede7ca670a3b8da7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-keyring
 * [new ref]         d958df7cce166c63ae65b1f7ede7ca670a3b8da7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d958df7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild