$ git clone -n https://src.fedoraproject.org/rpms/harfbuzz.git /var/lib/mock/f39-build-1491116-34516/root/chroot_tmpdir/scmroot/harfbuzz
Cloning into '/var/lib/mock/f39-build-1491116-34516/root/chroot_tmpdir/scmroot/harfbuzz'...
$ git fetch origin cdf3cdb38087652f2066392fe934d003261d05c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/harfbuzz
 * [new ref]         cdf3cdb38087652f2066392fe934d003261d05c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cdf3cdb Resolves:rh#2241391 - Fix LibreOffice tests run