$ git clone -n https://src.fedoraproject.org/rpms/openjfx.git /var/lib/mock/f40-build-2265645-54613/root/chroot_tmpdir/scmroot/openjfx
Cloning into '/var/lib/mock/f40-build-2265645-54613/root/chroot_tmpdir/scmroot/openjfx'...
$ git fetch origin 161d7c2413e76add384bb3f6a596cc4049393d49:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openjfx
 * [new ref]         161d7c2413e76add384bb3f6a596cc4049393d49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 161d7c2 Update version in spec file