$ git clone -n https://src.fedoraproject.org/rpms/rust-shared_thread.git /var/lib/mock/f45-build-44964-820/root/chroot_tmpdir/scmroot/rust-shared_thread
Cloning into '/var/lib/mock/f45-build-44964-820/root/chroot_tmpdir/scmroot/rust-shared_thread'...
$ git fetch origin 7c11f29d37463e571ac9d47542f568ebe30a299c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-shared_thread
 * [new ref]         7c11f29d37463e571ac9d47542f568ebe30a299c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c11f29 Update to version 0.2.1; Fixes RHBZ#2527824