$ git clone -n https://src.fedoraproject.org/rpms/jacop.git /var/lib/mock/f40-build-2691867-68163/root/chroot_tmpdir/scmroot/jacop
Cloning into '/var/lib/mock/f40-build-2691867-68163/root/chroot_tmpdir/scmroot/jacop'...
$ git fetch origin e3798b60184626beb337bfdf586edfc48e5b0363:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jacop
 * [new ref]         e3798b60184626beb337bfdf586edfc48e5b0363 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3798b6 Rebuilt for java-21-openjdk as system jdk