$ git clone -n https://src.fedoraproject.org/rpms/rust-lmdb.git /var/lib/mock/f45-build-42993-799/root/chroot_tmpdir/scmroot/rust-lmdb
Cloning into '/var/lib/mock/f45-build-42993-799/root/chroot_tmpdir/scmroot/rust-lmdb'...
$ git fetch origin 053e413798d27b94c641fceae295a4427d34c8dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lmdb
 * [new ref]         053e413798d27b94c641fceae295a4427d34c8dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 053e413 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild