$ git clone -n https://src.fedoraproject.org/rpms/asdcplib.git /var/lib/mock/f42-build-862896-171231/root/chroot_tmpdir/scmroot/asdcplib
Cloning into '/var/lib/mock/f42-build-862896-171231/root/chroot_tmpdir/scmroot/asdcplib'...
$ git fetch origin a81d35d38ee6397c6302dd4b15ec05834aa4d4b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/asdcplib
 * [new ref]         a81d35d38ee6397c6302dd4b15ec05834aa4d4b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a81d35d Rebuild for xerces-c 3.3