$ git clone -n https://src.fedoraproject.org/rpms/rcs.git /var/lib/mock/f40-build-798249-141768/root/chroot_tmpdir/scmroot/rcs
Cloning into '/var/lib/mock/f40-build-798249-141768/root/chroot_tmpdir/scmroot/rcs'...
$ git fetch origin 4439931f3cb74eb3c90f79fcb9e382e1e987e354:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rcs
 * [new ref]         4439931f3cb74eb3c90f79fcb9e382e1e987e354 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4439931 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild