$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_ls.git /var/lib/mock/f41-build-side-1-2816512-32968/root/chroot_tmpdir/scmroot/rust-uu_ls
Cloning into '/var/lib/mock/f41-build-side-1-2816512-32968/root/chroot_tmpdir/scmroot/rust-uu_ls'...
$ git fetch origin fb87e5a3a9c234b1fdf06064f943c87ea6e6d3d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_ls
 * [new ref]         fb87e5a3a9c234b1fdf06064f943c87ea6e6d3d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb87e5a Update to version 0.0.27; Fixes: RHBZ#2271228