$ git clone -n https://src.fedoraproject.org/rpms/rust-iana-time-zone.git /var/lib/mock/f40-build-2641799-66435/root/chroot_tmpdir/scmroot/rust-iana-time-zone
Cloning into '/var/lib/mock/f40-build-2641799-66435/root/chroot_tmpdir/scmroot/rust-iana-time-zone'...
$ git fetch origin ef4dd35e0c9f2cdc47086de3752d6e34bf155e26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-iana-time-zone
 * [new ref]         ef4dd35e0c9f2cdc47086de3752d6e34bf155e26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef4dd35 Update to version 0.1.60; Fixes RHBZ#2262515