$ git clone -n https://src.fedoraproject.org/rpms/libffi.git /var/lib/mock/f41-build-side-1-3127020-39531/root/chroot_tmpdir/scmroot/libffi
Cloning into '/var/lib/mock/f41-build-side-1-3127020-39531/root/chroot_tmpdir/scmroot/libffi'...
$ git fetch origin e940beb3afab1a64f0c6cd8ed5228ca828983a80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libffi
 * [new ref]         e940beb3afab1a64f0c6cd8ed5228ca828983a80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e940beb Fix AArch64 BTI enablement issues (#2305877)