$ git clone -n https://src.fedoraproject.org/rpms/jacoco.git /var/lib/mock/f40-build-2699247-70144/root/chroot_tmpdir/scmroot/jacoco
Cloning into '/var/lib/mock/f40-build-2699247-70144/root/chroot_tmpdir/scmroot/jacoco'...
$ git fetch origin 9f0deaec808659a5cc003397495fe41d5e02b783:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jacoco
 * [new ref]         9f0deaec808659a5cc003397495fe41d5e02b783 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f0deae Merge branch 'rawhide' into f40