$ git clone -n https://src.fedoraproject.org/rpms/docbook-style-dsssl.git /var/lib/mock/f45-build-7666-368/root/chroot_tmpdir/scmroot/docbook-style-dsssl
Cloning into '/var/lib/mock/f45-build-7666-368/root/chroot_tmpdir/scmroot/docbook-style-dsssl'...
$ git fetch origin 6f5d94dfde781e5251121afa4e9de1bc1f0ade6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/docbook-style-dsssl
 * [new ref]         6f5d94dfde781e5251121afa4e9de1bc1f0ade6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f5d94d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild