$ git clone -n https://src.fedoraproject.org/rpms/libaec.git /var/lib/mock/f40-build-786147-134194/root/chroot_tmpdir/scmroot/libaec
Cloning into '/var/lib/mock/f40-build-786147-134194/root/chroot_tmpdir/scmroot/libaec'...
$ git fetch origin d49180c05848c3a25bfb4d7aa62d8c4c7ced5935:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libaec
 * [new ref]         d49180c05848c3a25bfb4d7aa62d8c4c7ced5935 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d49180c Update to 1.1.2