$ git clone -n https://src.fedoraproject.org/rpms/rust-chrono-tz.git /var/lib/mock/f38-build-side-43-rust-devel-1404217-31200/root/chroot_tmpdir/scmroot/rust-chrono-tz
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1404217-31200/root/chroot_tmpdir/scmroot/rust-chrono-tz'...
$ git fetch origin 53c27c56b00821f9a02d343fdc083c9efb72e5f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chrono-tz
 * [new ref]         53c27c56b00821f9a02d343fdc083c9efb72e5f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53c27c5 Update to version 0.8.3; Fixes RHBZ#2005995