$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_tail.git /var/lib/mock/f41-build-810896-146981/root/chroot_tmpdir/scmroot/rust-uu_tail
Cloning into '/var/lib/mock/f41-build-810896-146981/root/chroot_tmpdir/scmroot/rust-uu_tail'...
$ git fetch origin 6de598b786b7da2ebf6d14c821532d1469a0d34a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_tail
 * [new ref]         6de598b786b7da2ebf6d14c821532d1469a0d34a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6de598b Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces