$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_csplit.git /var/lib/mock/f41-build-810924-146985/root/chroot_tmpdir/scmroot/rust-uu_csplit
Cloning into '/var/lib/mock/f41-build-810924-146985/root/chroot_tmpdir/scmroot/rust-uu_csplit'...
$ git fetch origin 6031f86f07c4544a548641a791e026a9ae84f7a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_csplit
 * [new ref]         6031f86f07c4544a548641a791e026a9ae84f7a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6031f86 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces