$ git clone -n https://src.fedoraproject.org/rpms/libdeflate.git /var/lib/mock/f45-build-16039-481/root/chroot_tmpdir/scmroot/libdeflate
Cloning into '/var/lib/mock/f45-build-16039-481/root/chroot_tmpdir/scmroot/libdeflate'...
$ git fetch origin bdc4138c4313bfbd18dc1c63cc1cd6c6bc162449:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdeflate
 * [new ref]         bdc4138c4313bfbd18dc1c63cc1cd6c6bc162449 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bdc4138 Update to 1.26 (close RHBZ#2521544)