$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_ln.git /var/lib/mock/f40-build-779940-130557/root/chroot_tmpdir/scmroot/rust-uu_ln
Cloning into '/var/lib/mock/f40-build-779940-130557/root/chroot_tmpdir/scmroot/rust-uu_ln'...
$ git fetch origin e63c7f4dd73a589817e75379f2f162ab60c4283b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_ln
 * [new ref]         e63c7f4dd73a589817e75379f2f162ab60c4283b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e63c7f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild