$ git clone -n https://src.fedoraproject.org/rpms/R-DynDoc.git /var/lib/mock/f40-build-2032125-47672/root/chroot_tmpdir/scmroot/R-DynDoc
Cloning into '/var/lib/mock/f40-build-2032125-47672/root/chroot_tmpdir/scmroot/R-DynDoc'...
$ git fetch origin c228f98e59c23f58fe6eacab67c5e40650bf5232:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-DynDoc
 * [new ref]         c228f98e59c23f58fe6eacab67c5e40650bf5232 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c228f98 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild