$ git clone -n https://src.fedoraproject.org/rpms/notmuch.git /var/lib/mock/f41-build-772706-13507/root/chroot_tmpdir/scmroot/notmuch
Cloning into '/var/lib/mock/f41-build-772706-13507/root/chroot_tmpdir/scmroot/notmuch'...
$ git fetch origin 3353d87e54b18e204d888ea44ab6c7d56ba3d175:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/notmuch
 * [new ref]         3353d87e54b18e204d888ea44ab6c7d56ba3d175 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3353d87 Try to reduce timing issues in atomicity test