$ git clone -n https://src.fedoraproject.org/rpms/rust-chrono-tz.git /var/lib/mock/f40-build-2071928-49334/root/chroot_tmpdir/scmroot/rust-chrono-tz
Cloning into '/var/lib/mock/f40-build-2071928-49334/root/chroot_tmpdir/scmroot/rust-chrono-tz'...
$ git fetch origin 536521cb37130c1741d05db11f749ef0e4b96e47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chrono-tz
 * [new ref]         536521cb37130c1741d05db11f749ef0e4b96e47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 536521c Update to version 0.8.4; Fixes RHBZ#2246959