$ git clone -n https://src.fedoraproject.org/rpms/icu4j.git /var/lib/mock/f40-build-1801922-24878/root/chroot_tmpdir/scmroot/icu4j
Cloning into '/var/lib/mock/f40-build-1801922-24878/root/chroot_tmpdir/scmroot/icu4j'...
$ git fetch origin 97777e862247f31890b9fe1cf1401c1f10b67cb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icu4j
 * [new ref]         97777e862247f31890b9fe1cf1401c1f10b67cb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97777e8 Version 75.1