$ git clone -n https://src.fedoraproject.org/rpms/decnumber.git /var/lib/mock/f41-build-side-1-2817221-32985/root/chroot_tmpdir/scmroot/decnumber
Cloning into '/var/lib/mock/f41-build-side-1-2817221-32985/root/chroot_tmpdir/scmroot/decnumber'...
$ git fetch origin dbd9937c9ae67fd669eca5aad6c3e0cb11938b8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/decnumber
 * [new ref]         dbd9937c9ae67fd669eca5aad6c3e0cb11938b8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbd9937 Replaced by sdl-decnumber