$ git clone -n https://src.fedoraproject.org/rpms/at-spi2-core.git /var/lib/mock/f42-build-3306736-41426/root/chroot_tmpdir/scmroot/at-spi2-core
Cloning into '/var/lib/mock/f42-build-3306736-41426/root/chroot_tmpdir/scmroot/at-spi2-core'...
$ git fetch origin 76625887e6c525ffd3f5faea32bbc5b84bb80ede:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/at-spi2-core
 * [new ref]         76625887e6c525ffd3f5faea32bbc5b84bb80ede -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7662588 Update to 2.55.90