$ git clone -n https://src.fedoraproject.org/rpms/sdl-decnumber.git /var/lib/mock/f45-build-35730-698/root/chroot_tmpdir/scmroot/sdl-decnumber
Cloning into '/var/lib/mock/f45-build-35730-698/root/chroot_tmpdir/scmroot/sdl-decnumber'...
$ git fetch origin ed99eaf52ea5bd2a760499d79b5264ab37ceba55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sdl-decnumber
 * [new ref]         ed99eaf52ea5bd2a760499d79b5264ab37ceba55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed99eaf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild