$ git clone -n https://src.fedoraproject.org/rpms/libdstr.git /var/lib/mock/f45-build-16075-481/root/chroot_tmpdir/scmroot/libdstr
Cloning into '/var/lib/mock/f45-build-16075-481/root/chroot_tmpdir/scmroot/libdstr'...
$ git fetch origin 867a7ba476e70afde8fc28979f221a95ba35fe24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdstr
 * [new ref]         867a7ba476e70afde8fc28979f221a95ba35fe24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 867a7ba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild