$ git clone -n https://src.fedoraproject.org/rpms/rust-simple_logger.git /var/lib/mock/f39-build-1517180-35696/root/chroot_tmpdir/scmroot/rust-simple_logger
Cloning into '/var/lib/mock/f39-build-1517180-35696/root/chroot_tmpdir/scmroot/rust-simple_logger'...
$ git fetch origin 28371c0697b9752bdc3fc456bc60b8c50dd3f615:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-simple_logger
 * [new ref]         28371c0697b9752bdc3fc456bc60b8c50dd3f615 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28371c0 Update to version 4.2.0; Fixes RHBZ#2042597