$ git clone -n https://src.fedoraproject.org/rpms/corkscrew.git /var/lib/mock/f41-build-1034545-18640/root/chroot_tmpdir/scmroot/corkscrew
Cloning into '/var/lib/mock/f41-build-1034545-18640/root/chroot_tmpdir/scmroot/corkscrew'...
$ git fetch origin 357eec4b126b08b32a4af258b4e68838e0b46b44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/corkscrew
 * [new ref]         357eec4b126b08b32a4af258b4e68838e0b46b44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 357eec4 Eliminate use of obsolete %patchN syntax (#2283636)