$ git clone -n https://src.fedoraproject.org/rpms/rust-sys-locale.git /var/lib/mock/f40-build-2039962-48311/root/chroot_tmpdir/scmroot/rust-sys-locale
Cloning into '/var/lib/mock/f40-build-2039962-48311/root/chroot_tmpdir/scmroot/rust-sys-locale'...
$ git fetch origin 988aea6c474d3a911364ce498ae08c0b1e4e62ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sys-locale
 * [new ref]         988aea6c474d3a911364ce498ae08c0b1e4e62ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 988aea6 Update to version 0.3.1; Fixes RHBZ#2235205