$ git clone -n https://src.fedoraproject.org/rpms/rust-icu_provider.git /var/lib/mock/f45-build-42461-794/root/chroot_tmpdir/scmroot/rust-icu_provider
Cloning into '/var/lib/mock/f45-build-42461-794/root/chroot_tmpdir/scmroot/rust-icu_provider'...
$ git fetch origin 4bcba4ffa8ce15d7c058f441f8ac7d1d6dd1d5c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-icu_provider
 * [new ref]         4bcba4ffa8ce15d7c058f441f8ac7d1d6dd1d5c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bcba4f Update to version 2.3.0; Fixes RHBZ#2515896