$ git clone -n https://src.fedoraproject.org/rpms/rust-icu_collator_data.git /var/lib/mock/f45-build-42476-794/root/chroot_tmpdir/scmroot/rust-icu_collator_data
Cloning into '/var/lib/mock/f45-build-42476-794/root/chroot_tmpdir/scmroot/rust-icu_collator_data'...
$ git fetch origin 74cd557fc9a1ed15df087b8b7206d0c9743ae4dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-icu_collator_data
 * [new ref]         74cd557fc9a1ed15df087b8b7206d0c9743ae4dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74cd557 Update to version 2.3.0; Fixes RHBZ#2515880