$ git clone -n https://src.fedoraproject.org/rpms/hyperscan.git /var/lib/mock/f38-build-side-42-init-devel-1290774-30674/root/chroot_tmpdir/scmroot/hyperscan
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1290774-30674/root/chroot_tmpdir/scmroot/hyperscan'...
$ git fetch origin 81a8d04cb3088779859afb917999e881ab2b4d94:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hyperscan
 * [new ref]         81a8d04cb3088779859afb917999e881ab2b4d94 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81a8d04 patch validation bug