$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_split.git /var/lib/mock/f40-build-1971918-25224/root/chroot_tmpdir/scmroot/rust-uu_split
Cloning into '/var/lib/mock/f40-build-1971918-25224/root/chroot_tmpdir/scmroot/rust-uu_split'...
$ git fetch origin d05dc79177a3db00b8bdda47095b86aadea8d72a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_split
 * [new ref]         d05dc79177a3db00b8bdda47095b86aadea8d72a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d05dc79 Update to version 0.0.27; Fixes: RHBZ#2260242