$ git clone -n https://src.fedoraproject.org/rpms/castget.git /var/lib/mock/f40-build-1956630-25197/root/chroot_tmpdir/scmroot/castget
Cloning into '/var/lib/mock/f40-build-1956630-25197/root/chroot_tmpdir/scmroot/castget'...
$ git fetch origin b74de0af2a611d0a1b3ddd6a2cf2231bb9474db5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/castget
 * [new ref]         b74de0af2a611d0a1b3ddd6a2cf2231bb9474db5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b74de0a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild