$ git clone -n https://src.fedoraproject.org/rpms/javapackages-tools.git /var/lib/mock/f40-build-2241320-53661/root/chroot_tmpdir/scmroot/javapackages-tools
Cloning into '/var/lib/mock/f40-build-2241320-53661/root/chroot_tmpdir/scmroot/javapackages-tools'...
$ git fetch origin 09b403ba634b1825453ebdad263a61d010779414:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/javapackages-tools
 * [new ref]         09b403ba634b1825453ebdad263a61d010779414 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09b403b Fix flatpak builds of Java packages