$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_runcon.git /var/lib/mock/f42-build-3421894-45166/root/chroot_tmpdir/scmroot/rust-uu_runcon
Cloning into '/var/lib/mock/f42-build-3421894-45166/root/chroot_tmpdir/scmroot/rust-uu_runcon'...
$ git fetch origin 2d91cb71d14ad02ee9ea8b7c7684c72c2ea9c4c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_runcon
 * [new ref]         2d91cb71d14ad02ee9ea8b7c7684c72c2ea9c4c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d91cb7 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild