$ git clone -n https://src.fedoraproject.org/rpms/rust-icu_time_data.git /var/lib/mock/f45-build-42495-794/root/chroot_tmpdir/scmroot/rust-icu_time_data
Cloning into '/var/lib/mock/f45-build-42495-794/root/chroot_tmpdir/scmroot/rust-icu_time_data'...
$ git fetch origin 2b01b0e04ed0fcd73b30355b3937c18c5ca82125:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-icu_time_data
 * [new ref]         2b01b0e04ed0fcd73b30355b3937c18c5ca82125 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b01b0e Update to version 2.3.0; Fixes RHBZ#2515900