$ git clone -n https://src.fedoraproject.org/rpms/squid.git /var/lib/mock/f40-build-704312-12987/root/chroot_tmpdir/scmroot/squid
Cloning into '/var/lib/mock/f40-build-704312-12987/root/chroot_tmpdir/scmroot/squid'...
$ git fetch origin 8f425c9ec24cef71e2cca266d6e2906ab6c7a21a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/squid
 * [new ref]         8f425c9ec24cef71e2cca266d6e2906ab6c7a21a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f425c9 Resolves: #2262715 - squid-6.9 is available