$ git clone -n https://src.fedoraproject.org/rpms/R-mockr.git /var/lib/mock/f40-build-2340042-59690/root/chroot_tmpdir/scmroot/R-mockr
Cloning into '/var/lib/mock/f40-build-2340042-59690/root/chroot_tmpdir/scmroot/R-mockr'...
$ git fetch origin a82b7e9b09f2e2c1a6b9fbda23e324e52f80f19b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mockr
 * [new ref]         a82b7e9b09f2e2c1a6b9fbda23e324e52f80f19b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a82b7e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild