$ git clone -n https://src.fedoraproject.org/rpms/icu4j.git /var/lib/mock/f39-build-2300776-56714/root/chroot_tmpdir/scmroot/icu4j
Cloning into '/var/lib/mock/f39-build-2300776-56714/root/chroot_tmpdir/scmroot/icu4j'...
$ git fetch origin c2bb49228b59c0903b125113ce213ae4add95c13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icu4j
 * [new ref]         c2bb49228b59c0903b125113ce213ae4add95c13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2bb492 Version 74.2