$ git clone -n https://src.fedoraproject.org/rpms/plotdrop.git /var/lib/mock/f41-build-756773-13422/root/chroot_tmpdir/scmroot/plotdrop
Cloning into '/var/lib/mock/f41-build-756773-13422/root/chroot_tmpdir/scmroot/plotdrop'...
$ git fetch origin ccd679640a564e409b59a0f5b0a208963c269ce7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plotdrop
 * [new ref]         ccd679640a564e409b59a0f5b0a208963c269ce7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ccd6796 Eliminate use of obsolete %patchN syntax (#2283636)