$ git clone -n https://src.fedoraproject.org/rpms/z3.git /var/lib/mock/f40-build-2216848-52519/root/chroot_tmpdir/scmroot/z3
Cloning into '/var/lib/mock/f40-build-2216848-52519/root/chroot_tmpdir/scmroot/z3'...
$ git fetch origin 7e13c112079c11617e21642f3925b25a61ce62bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/z3
 * [new ref]         7e13c112079c11617e21642f3925b25a61ce62bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e13c11 Fix python package library load name (bz 2255464)