$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_wc.git /var/lib/mock/f40-build-1971929-25224/root/chroot_tmpdir/scmroot/rust-uu_wc
Cloning into '/var/lib/mock/f40-build-1971929-25224/root/chroot_tmpdir/scmroot/rust-uu_wc'...
$ git fetch origin e99a65ef196298d99cfb558f0ead3b2b27013062:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_wc
 * [new ref]         e99a65ef196298d99cfb558f0ead3b2b27013062 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e99a65e Update to version 0.0.27; Fixes: RHBZ#2260257