$ git clone -n https://src.fedoraproject.org/rpms/elementary-code.git /var/lib/mock/f45-build-47280-865/root/chroot_tmpdir/scmroot/elementary-code
Cloning into '/var/lib/mock/f45-build-47280-865/root/chroot_tmpdir/scmroot/elementary-code'...
$ git fetch origin cd2c506c0280de2388cd17329d0eb818e67c1257:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elementary-code
 * [new ref]         cd2c506c0280de2388cd17329d0eb818e67c1257 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd2c506 Update to version 8.2.0; Fixes RHBZ#2448174