$ git clone -n https://src.fedoraproject.org/rpms/at-spi2-core.git /var/lib/mock/f39-build-1522879-35968/root/chroot_tmpdir/scmroot/at-spi2-core
Cloning into '/var/lib/mock/f39-build-1522879-35968/root/chroot_tmpdir/scmroot/at-spi2-core'...
$ git fetch origin 0af693caf0b5f3e6052ac4f071bb4edfdb5ce1bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/at-spi2-core
 * [new ref]         0af693caf0b5f3e6052ac4f071bb4edfdb5ce1bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0af693c Update to 2.50.0