$ git clone -n https://src.fedoraproject.org/rpms/libplist.git /var/lib/mock/f40-build-2008128-45337/root/chroot_tmpdir/scmroot/libplist
Cloning into '/var/lib/mock/f40-build-2008128-45337/root/chroot_tmpdir/scmroot/libplist'...
$ git fetch origin 68103e8e4f0783e2bfbd5d54040407eb3cc4c80c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libplist
 * [new ref]         68103e8e4f0783e2bfbd5d54040407eb3cc4c80c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68103e8 Update to 2.3.0; Fixes: RHBZ#2217642