$ git clone -n https://src.fedoraproject.org/rpms/at-spi2-core.git /var/lib/mock/f40-build-787443-134774/root/chroot_tmpdir/scmroot/at-spi2-core
Cloning into '/var/lib/mock/f40-build-787443-134774/root/chroot_tmpdir/scmroot/at-spi2-core'...
$ git fetch origin 4379a88796792d061170f537d8d918a56b607f18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/at-spi2-core
 * [new ref]         4379a88796792d061170f537d8d918a56b607f18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4379a88 Update to 2.51.90