$ git clone -n https://src.fedoraproject.org/rpms/zxcvbn-c.git /var/lib/mock/f45-build-39436-735/root/chroot_tmpdir/scmroot/zxcvbn-c
Cloning into '/var/lib/mock/f45-build-39436-735/root/chroot_tmpdir/scmroot/zxcvbn-c'...
$ git fetch origin 2b140450311302742f70893dc43b09ae2a71bf2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zxcvbn-c
 * [new ref]         2b140450311302742f70893dc43b09ae2a71bf2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b14045 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild