$ git clone -n https://src.fedoraproject.org/rpms/libabigail.git /var/lib/mock/f42-build-side-1-3502904-45979/root/chroot_tmpdir/scmroot/libabigail
Cloning into '/var/lib/mock/f42-build-side-1-3502904-45979/root/chroot_tmpdir/scmroot/libabigail'...
$ git fetch origin 2cc4122c807bcb186356ad70b89f3b5a84533a4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libabigail
 * [new ref]         2cc4122c807bcb186356ad70b89f3b5a84533a4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cc4122 Update to upstream 2.7 tarball