$ git clone -n https://src.fedoraproject.org/rpms/drgeo.git /var/lib/mock/f41-build-1018490-17947/root/chroot_tmpdir/scmroot/drgeo
Cloning into '/var/lib/mock/f41-build-1018490-17947/root/chroot_tmpdir/scmroot/drgeo'...
$ git fetch origin cc71b74927def36169d80c471660411275108c38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/drgeo
 * [new ref]         cc71b74927def36169d80c471660411275108c38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc71b74 Eliminate use of obsolete %patchN syntax (#2283636)