$ git clone -n https://src.fedoraproject.org/rpms/disktype.git /var/lib/mock/f40-build-2262125-54469/root/chroot_tmpdir/scmroot/disktype
Cloning into '/var/lib/mock/f40-build-2262125-54469/root/chroot_tmpdir/scmroot/disktype'...
$ git fetch origin 3d8533d819d92f4815a7546fa40843f88f146c46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/disktype
 * [new ref]         3d8533d819d92f4815a7546fa40843f88f146c46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d8533d Remove deprecated %patch syntax