$ git clone -n https://src.fedoraproject.org/rpms/tokyocabinet.git /var/lib/mock/f45-build-37253-712/root/chroot_tmpdir/scmroot/tokyocabinet
Cloning into '/var/lib/mock/f45-build-37253-712/root/chroot_tmpdir/scmroot/tokyocabinet'...
$ git fetch origin 1aa43d5c0dc9a47f1d96e7180b0552d78bd08ea8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tokyocabinet
 * [new ref]         1aa43d5c0dc9a47f1d96e7180b0552d78bd08ea8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1aa43d5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild